C11

C11, C.XI, C-11 or C.11 may refer to:

In transport, vehicles, ships or public transport routes:

• C-11 Fleetster, a 1920s American light transport aircraft for use of the United States Assistant Secretary of War
• Fokker C.XI, a 1935 Dutch reconnaissance seaplane
• LET C-11, a license-build variant of the Soviet Yakovlev Yak-11 trainer aircraft
• C-11 Gulfstream II, the military designation of the Gulfstream II business jet
• Barroso (C11), a light cruiser of the Brazilian Navy
• HMS C11, a 1907 British Royal Navy C class submarine
• HMS Liverpool (C11), a 1937 British Royal Navy Town class light cruiser
• USS Marblehead (C-11), a 1892 light cruiser of the United States Navy
• BSA C11, a British motorcycle manufactured between 1939 and 1956
• Mercedes-Benz C11, a 1990 Group C prototype race car
• London Buses route C11, a public transportation route in England

In other uses:

• C11 (C standard revision), standardized version of the C programming language
• C11 (rifle), a competition and training weapon used by members of the Royal Canadian Army Cadets
• C11, the Malignant neoplasm of nasopharynx ICD-10 code
• C11, the Medical Subject Headings code for eye diseases
• Carbon-11, an unstable isotope of the chemical element Carbon
• Caldwell 11 (NGC 7635, the Bubble Nebula), an emission nebula in the constellation Cassiopeia
• C11 Right of Association (Agriculture) Convention, 1921
• Canada's Bill C-11 seeking in 2011-12 to amend the Copyright Act of Canada

See also

• 11C (disambiguation)